What is the severity of CVE-2021-39887?

CVE-2021-39887 is classified as a moderate severity vulnerability due to its impact on user data.

How do I fix CVE-2021-39887?

To fix CVE-2021-39887, upgrade GitLab to version 14.1.7 or later, or apply the relevant patches provided by GitLab.

What types of attacks can CVE-2021-39887 facilitate?

CVE-2021-39887 can facilitate stored Cross-Site Scripting (XSS) attacks, allowing attackers to execute arbitrary JavaScript on victim users.

Which versions of GitLab are affected by CVE-2021-39887?

CVE-2021-39887 affects GitLab CE/EE versions from 8.4.0 up to but not including 14.1.7, among other versions.

Is user data at risk due to CVE-2021-39887?

Yes, user data may be at risk due to malicous scripts being executed in the context of the user's browser.

Vulnerability/
CVE-2021-39887

high

7.3

CWE

5/10/2021

4/8/2024

CVE-2021-39887: XSS

First published: Tue Oct 05 2021(Updated: )

A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.

Credit: cve@gitlab.com

Affected Software	Affected Version	How to fix
GitLab	>=8.4.0<14.1.7
GitLab	>=8.4.0<14.1.7
GitLab	>=14.2<14.2.5
GitLab	>=14.2<14.2.5
GitLab	>=14.3<14.3.1
GitLab	>=14.3<14.3.1

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Frequently Asked Questions

What is the severity of CVE-2021-39887?
CVE-2021-39887 is classified as a moderate severity vulnerability due to its impact on user data.
How do I fix CVE-2021-39887?
To fix CVE-2021-39887, upgrade GitLab to version 14.1.7 or later, or apply the relevant patches provided by GitLab.
What types of attacks can CVE-2021-39887 facilitate?
CVE-2021-39887 can facilitate stored Cross-Site Scripting (XSS) attacks, allowing attackers to execute arbitrary JavaScript on victim users.
Which versions of GitLab are affected by CVE-2021-39887?
CVE-2021-39887 affects GitLab CE/EE versions from 8.4.0 up to but not including 14.1.7, among other versions.
Is user data at risk due to CVE-2021-39887?
Yes, user data may be at risk due to malicous scripts being executed in the context of the user's browser.

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agent/weakness
agent/author
agent/softwarecombine
agent/description
collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/severity
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/gitlab
canonical/gitlab
version/gitlab/8.4.0
version/gitlab/14.2
version/gitlab/14.3

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Frequently Asked Questions

What is the severity of CVE-2021-39887?
CVE-2021-39887 is classified as a moderate severity vulnerability due to its impact on user data.
How do I fix CVE-2021-39887?
To fix CVE-2021-39887, upgrade GitLab to version 14.1.7 or later, or apply the relevant patches provided by GitLab.
What types of attacks can CVE-2021-39887 facilitate?
CVE-2021-39887 can facilitate stored Cross-Site Scripting (XSS) attacks, allowing attackers to execute arbitrary JavaScript on victim users.
Which versions of GitLab are affected by CVE-2021-39887?
CVE-2021-39887 affects GitLab CE/EE versions from 8.4.0 up to but not including 14.1.7, among other versions.
Is user data at risk due to CVE-2021-39887?
Yes, user data may be at risk due to malicous scripts being executed in the context of the user's browser.